package com.neo.springcloud.alibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.neo.springcloud.alibaba.service.PaymentService;
import com.neo.springcloud.entities.CommonResult;
import com.neo.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

/**
 * @ClassName: CircleBreakerController
 * @Title: cloud2021
 * @Package: com.neo.springcloud.alibaba.controller
 * @Description:
 * @Author: Kisen
 * @Date: 2021/11/17 0:31
 */
@RestController
@Slf4j
public class CircleBreakerController {

    @Value("${service-url.nacos-user-service}")
    private String serverURL;

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private PaymentService paymentService;

    @RequestMapping("/consumer/fallback/{id}")
    //@SentinelResource(value = "fallback", fallback = "handlerFallback") //fallback处理运行异常
    //@SentinelResource(value = "fallback", blockHandler = "blockHandler") //blockHandler只负责Sentinel配置违规
    @SentinelResource(value = "fallback",
            fallback = "handlerFallback",
            blockHandler = "blockHandler",
            exceptionsToIgnore = {IllegalArgumentException.class})
    public CommonResult<Payment> fallback(@PathVariable Long id) {
        CommonResult<Payment> result = restTemplate.getForObject(serverURL + "/paymentSQL/" + id, CommonResult.class, id);

        if (id == 4) {
            throw new IllegalArgumentException("IllegalArgumentException, 非法参数异常...");
        } else if (result.getData() == null) {
            throw new NullPointerException("NullPointerException, 该ID没有对应记录, 空指针异常");
        }
        return result;
    }

    public CommonResult handlerFallback(@PathVariable Long id, Throwable e) {
        Payment payment = new Payment(id, "null");
        return new CommonResult(444, "兜底异常handlerFallback, exception内容：" + e.getMessage(), payment);
    }

    public CommonResult blockHandler(@PathVariable Long id, BlockException e) {
        Payment payment = new Payment(id, "null");
        return new CommonResult(444, "blockHandler-Sentinel限流，无此流水，blockException：" + e.getMessage(), payment);
    }

    @GetMapping(value = "/consumer/paymentSQL/{id}")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {
        return paymentService.paymentSQL(id);
    }
}
